Explorations Through Time - Life Has a History



Explorations Through Time - Life Has a History

- Go to "Life Has a History" ' Level 2

1. How many different species of living things exist today? ___________________

2. Which group of animals has the largest number of species? _______________________

3. How many mammal species exist today? ______________

4. Number the organisms from 1 (most abundant) to 8 (least abundant)

____ Mammals ____ Molluscs___ Roundworms ____ Arthropods ____ Flatworms

5. What is biodiversity (click on the purple links for definitions): _________________________________________________

6. 470 Million Years Ago (click circle for a "closer look" at the period)

What was the name of the period? ________________________

What was the dominant predator? ____________________________

What was the first arthropod? ________________________

7. 160 Million Years Ago

What was the name of the period? _____________________________

What large marine reptile existed? _____________________________

8. How old is the earth? _______________________

9. Fill in the blanks of the timeline

[pic]

10. The best source of evidence for determining events in earth's history is ______________

11. What is a paleontologist? __________________________

12. Identify three fossils from the image. Name them and point to them with an arrow

_______________________________

_______________________________

_______________________________

13. What features are found in therapods

____________________________________

____________________________________

14. What is a cladogram?

______________________________________

______________________________________

15. What is divergence?

_____________________________________

16. To which animal are the crane and eagle most closely related? _______________________

17. What other data (besides physical features) do scientists use to find if organisms are related? List 3 things. _______________________________________

18. What birds on the Galapagos islands were adapted to different regions? ________________

19. The beaks of the birds vary with what? ___________________________________

20. What would happen if the environment changed and only plants with larger, harder seeds survived.How do you think that might affect the population of Geospiza fortis finches?

________________________________________________________

21. What is geographic isolation? _______________________________________________________

22. Identify the extinct creature. _____________________________________________

23. Name two animals that have gone extinct since humans have been around. ______________________________________________

Using Google: Find the Taxonomic Classification for Human, Chimpanzee, Bengal Tiger, and Tree Frog. Which organisms are most closely related? Explain why?

| |Human |Chimpanzee |Bengal Tiger |Red-Eyed Tree Frog |

|Kingdom | | | | |

|Phylum | | | | |

|Order | | | | |

|Family | | | | |

|Genus | | | | |

|Species | | | | |

|Scientific Name | | | | |

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